Aneurysm

An aneurysm is a localized ballooning in an artery due to a weak portion of the vessel wall. A ruptured aneurysm can cause hemorrhaging that is severely debilitating or fatal. The two most medically significant aneuryms occur at the base of the brain (intracranial aneurysms) and in the artery coming out of the heart (aortic aneurysms) Wikipedia. The most common type of aortic aneurysm is abdominal aortic aneurysm (AAA). Wikipedia

As of 2010, at least 6 gene regions are known to be associated with increased risk for intracranial aneurysms in multiple ethnic groups, usually with multiple SNPs per region. [PMID 20364137],
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